<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            color: aqua;
        }
        #home{
            color: antiquewhite;
        }
    </style>
</head>
<body>
    <div>我是div1</div>
    <div class="box">我是div2</div>
    <div id="home">我是div3</div>
</body>
</html>